package org.smart4j.framework.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * 反射工具类
 *
 * Created by chinalin on 2017/3/15.
 */
public class ReflectionUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(ReflectionUtil.class) ;

    /**
     * 创建实例
     */
    public static Object newInstance(Class<?> cls){
        Object instance ;
        try {
            instance = cls.newInstance() ;
        } catch (Exception e){
            LOGGER.error("new instance failure", e);
            throw new RuntimeException(e) ;
        }
        return instance ;
    }

    /**
     * 调用方法
     */
    public static Object invokeMethod(Object obj, Method method, Object...args){
        Object result ;
        try {
            method.setAccessible(true);     //方法启用时，禁用安全检查JAVA语言访问检查,提高性能,true才可以访问private成员
            result = method.invoke(obj, args) ;
        } catch ( Exception e){
            LOGGER.error("invoke method failure", e);
            throw  new RuntimeException(e) ;
        }
        return result ;
    }

    /**
     * 设置成员变量的值
     */
    public static void setField(Object obj, Field field, Object value){
        try {
            field.setAccessible(true);     //方法启用时，禁用安全检查JAVA语言访问检查,提高性能,true才可以访问private成员
            field.set(obj, value);
        } catch (Exception e){
            LOGGER.error("set field failure", e);
            throw new RuntimeException(e) ;
        }
    }
}
